Question

The length of a rectangle is 20 cm more than its breadth. If the perimeter is 100 cm, find the length of rectangle​

Answer 1

$\sf\huge\underline{Answer:}$

Let, Breadth of rectangle (b) = b

Then, Length of rectangle (l) = b + 20

Given perimeter is 100cm

$p = 2(l + b)$

$100 = 2(b + 20 + b)$

$50 = 2b + 20$

$2b = 30$

$b = 15$

Length of the rectangle = 20 + 15 = 35 cm